Sony Ericsson HPM75 Stereo Portable Handsfree Your Stereo Portable Handsfree HPM-75 has a 3.5 mm plug built in so that you can swap the headphones Every detail is for great sound quality. Changeable ear buds fit perfectly to block noise and get into the bass. And not bother the person next to you A microphone is built in for voice conversations. 3.5mm input jack. A convenient button enables one touch call handling. Each element of a Sony Ericsson music accessory is designed for the best audio performance. Clear sound, deep bass and better performance as standard.